P2O5-SnF2-WO3系统低熔点封接玻璃的研究

无铅低熔点密封玻璃具有低转变温度、低软化温度、低成本、高体电阻率等性能,采用高温熔融法制备了P_2O_5-SnF_2-WO_3体系无铅低熔点密封玻璃,利用X射线衍射仪、热膨胀仪、高阻抗弱电流测试仪等对玻璃样品进行性能表征,并绘制了P_2O_5-SnF_2-WO_3体系无铅低熔点密封玻璃的玻璃形成区域。结果表明:不同含量的SnO掺杂降低了玻璃样品的热膨胀系数,线性增加了体电阻率,但掺杂过多会提升玻璃的封接温度。B_2O_3的掺杂使热膨胀系数和体电阻率先呈现升高后降低的趋势,当掺杂量为2wt%时,玻璃的热膨胀系数和体电阻率均达到最大值。     

封接用铋酸盐微晶玻璃的制备

采用常规熔体冷却法和玻璃粉末低温烧结法制备了铋酸盐基础玻璃及其微晶玻璃。利用扫描示差量热(DSC)、X射线衍射(XRD)、热膨胀系数、抗弯强度等分析测试方法研究了基础玻璃的特征温度、析晶、热处理温度对玻璃析晶以及对微晶玻璃热膨胀系数、抗弯强度的影响。结果表明:基础玻璃的热膨胀系数随Bi2O3含量的增加而递增;玻璃化转变温度和软化温度随Bi2O3含量的增加而递减;Bi2O3含量不同,低温处理下获得的晶相种类相同,而高温处理下获得的晶相种类不同。在400℃、500℃、600℃晶化处理时,50Bi2O3-20B2O3-15ZnO-10BaO组成玻璃析出的晶相分别是Bi45BO69/Bi2O3、Bi2O3/Bi24B2O39和Bi24B2O39;65Bi2O3-5B2O3-15ZnO-10BaO组成玻璃析出的晶相分别是Bi45BO69/Bi2O3、Bi2O3和Bi38ZnO58。     

耐热高强硼硅酸盐玻璃中混合碱的研究

研究了Na2O-Li2O、Na2O-K2O不同二元混合碱对硼硅酸盐玻璃热膨胀系数及膨胀软化温度的影响.结果表明,在Na2O-Li2O、Na2O-K2O二元混合碱硼硅酸盐玻璃中热膨胀系数曲线基本呈线性变化,玻璃的热膨胀系数和膨胀软化温度并未出现明显的"混合碱效应".     

无机支柱真空玻璃的封接边缘受力分析

利用有限元软件对真空玻璃在大气压荷载下的受力进行模拟分析,可以得到详细直观的受力结果,弥补了理论公式难以准确得到真空玻璃受力情况的缺点,更好地为真空玻璃的应用提供理论数据。文章利用ANSYS有限元软件模拟分析了无机支撑柱的真空玻璃,研究封接边缘受力及其对真空玻璃受力的影响。结果表明:真空玻璃受到的压力由支撑柱和封边共同承担,封边区域既有压力也有拉力;封边对第1、2圈支撑柱的影响最大;将位移最大的第2圈支撑柱的弹性模量增大,甚至采用不同于无机支柱的刚性支柱,可以减小真空玻璃在大气压下的最大位移;在变形允许的范围内,真空玻璃的支撑柱的高度可以适当增加。     

含氮磷酸盐玻璃的结构和性能

用二次熔化法制备了不同氯含量的含氮磷酸盐玻璃。对其性能的测试结果表明．由于氮的引入。玻璃的热膨胀系数(a)有所降低．玻璃的转变温度（Ta)、显微硬度(Hv)、化学稳定性都有不同程度的提高，特别是玻璃在水中的溶解度随含氮量的提高急剧下降趋势．玻璃样品的X射线光电子能谱(XPS)、Raman,光谱研究表明．氮在此类玻璃中的结构状态与在AIN、S13N4、BN等晶体氮化物中相似。氮主要以负三价三个耦合键的形式与三个磷原子键合．强有力的P-N键使玻璃的网络结构变得更紧密了．X-ray荧光分析研究结果表明：含氮磷酸盐玻璃中的铝与氧形成了[A1O4]和[AlO4]，处于六配位的铝的数量稍多一些。     

生物泡沫玻璃的制备及性能研究

根据人体骨骼成分和玻璃形成区相图设计了生物玻璃的基础配方，并以此为原料，加以适量的发泡剂和外掺剂，在一定的温度制度下使其发泡，制备了生物泡沫玻璃，通过控制发泡温度、升温速度、发泡时间及发泡剂的数量与粒径来控制生物玻璃的容重、内部气孔形貌、孔径大小，在此基础上对生物玻璃的性能测试、分析，得出了合理的配方和工艺制度，对影响泡径的因素和如何得到均匀分布的连通孔进行了分析与探讨。     

Tb:YAG微晶玻璃的制备及其发光性能

采用熔融法制备Tb3+掺杂Na F-Y2O3-Al2O3-SiO2系统玻璃,并进行不同温度的热处理,制备出晶相为YAG的微晶玻璃.通过XRD、SEM、荧光光谱仪研究微晶玻璃的晶相、形貌、光谱性能.结果表明:掺Tb3+的基础玻璃经1 300℃热处理能得到含纯YAG晶相的微晶玻璃,晶粒大小在25~75 nm;在微晶玻璃中Tb3+蓝光发射强度减弱,而绿光发射强度得到增强.     

B2O3对锂铝硅系统微晶玻璃结构性能的影响

采用差热分析(DTA),X-ray衍射分析(XRD),扫描电镜分析(SEM)等手段研究热处理制度对锂铝硅透明微晶玻璃热膨胀系数的影响。结果表明,随B2O3含量的增加,玻璃的熔化温度降低,熔化质量提高。经处理后的微晶玻璃样品,随B2O3含量的增加,透明性变差。当B2O3的含量超过3%时,出现比较严重的分相现象。微晶玻璃的主晶相为LixAlxSi1-xO2固溶体。     

压电微晶玻璃的制备及性能

选用ＢａＯ－Ｓｒｏ－ＴｉＯ２－ＳｉＯ２（ＢＳＴＳ）系统，制备了具有压电性能的微晶玻璃，研究了基础玻璃组成对显微结构和压电性能的影响，探讨了梯温场中非钛电极性晶体的定向析晶机理。与其它压电材料相比，ＢＳＴＳ压电微晶玻璃具有较高的压电优值因子，是一种较理想的水声换能材料，尤其适用于标准水听器。     

Forming regularity and relation between composition and property of B_2O_3-BaO-ZnO glass

1INTRODUCTION Colorplasmadisplaypanel(PDP)isakindofeligibleapparatusforlargearea,hang on wallhighdefinitiontelevisions,computermonitorsandvari ousdisplaypanelsforcivilianandmilitaryapplica tion[13].Comparedwithotherflatdisplaypanels,themarketperspectiveforPDPisrapidlygrowingbecauseoftheiradvantagessuchasthinthickness,lowdensity,largeareaandlargevisualangle[4,5].TheglasssubstratesandthedisplayelectrodesinPDParethemainpartsandplayaveryimportantroleinhighperformancePDP[6].Inordertopro t…     

Forming regularity and relation between composition and property of B2O3-BaO-ZnO glass

B2O3-BaO-ZnO glass was prepared by using conventional melt quenching technology. The forming regularity and the relationship between the composition and the property of B2O3-BaO-ZnO glass were investigated. The results show that the composition range for forming B2O3-BaO-ZnO glass is very wide, but the content of B2O3 has a limit within mole fraction of 25%-75%. When the content of B2O3 is over the limit, the melt will be divided into two phases with different compositions and structures, whereas too low content of B2O3 will result in the crystallization of the melt during the cooling process. The thermal expansion coefficient, the transition temperature and the resistivity of the glass at room temperature are (5-10)×10-6 ℃-1, 480-620 ℃ and (1.5-3.0)×1010 Ω·m, respectively.     

低温无铅乳浊玻璃釉性能研究

采用熔融法,选取Na2O-BaO-ZnO-B2O3-SiO2系低熔点玻璃为基釉,以TiO2为乳浊剂,通过乳浊剂不同的加入方式制备了低温无铅乳浊玻璃釉.通过X射线衍射、扫描电镜及EDS能谱分析,研究了TiO2的不同加法及TiO2同一含量不同釉烧温度下对釉面性能及釉的显微结构的影响,并对以TiO2作为乳浊剂的乳浊釉的乳浊机理进行探讨.结果表明:乳浊剂不同的加入方式、加入量不同,乳浊相的存在状态、乳浊机理、乳浊效果不同.当采用双加法(即熔加和磨加相结合)后,既有未熔、散布在基体中晶粒的,也有析出晶相并促使所存晶相发育良好相结合从而使釉面形成良好乳浊.在620℃釉烧温度下以熔加2%并磨加5.5%TiO2时,发现釉中晶体数量密集,尺寸与可见光相近,分散性高,使釉对光的折射和散射能力强,釉面乳白效果最好,白度可达到71.88.     

硫酸精制装置玻璃管路密封失效治理

从生产实际出发 ,介绍了国外引进硫酸精制装置玻璃管路密封件国产化改造的相关工作     

Effects of Chemical Treatments on Thermal Expansion Properties of Cordierite Ceramics

Cordierite honeycomb ceramics was treated with 1.5 M HNO3 , followed with 1.5 M NaOH at 93 ℃. The combination of acid treatment with alkali treatment significantly diminished the rebounding of coefficient of thermal expansion （CTE） caused by heat treatment, a phenomenon observed in samples treated solely with acid. Inductively coupled plasma （ICP） analysis results reveal that the alkali treatment preferentially dissolved ＂free＂ SiO2 left in the acid-treated samples, which is considered to be a key factor responsible for the CTE rebounding.     

Preparation and properties of a new scintillating glass

1　ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｈｉｇｈ ｅｎｅｒｇｙｐａｒｔｉｃｌｅｐｈｙｓｉｃｓｅｘｐｅｒｉｍｅｎｔｓｎｅｅｄｄｅｔｅｃｔｏｒｓ ,ｗｈｉｃｈｃａｎｂｅｕｓｅｄｉｎｈｉｇｈｒａｄｉａｔｉｏｎｅｎｖｉｒｏｎｍｅｎｔ.Ｔｈｅｓｅｄｅｔｅｃｔｏｒｓｒｅｑｕｉｒ     

Effect of Kovar alloy oxidized in simulated N2/H2O atmosphere on its sealing with glass

The effect of Kovar alloy oxidized in simulated field atmosphere on its sealing with glass was studied in this article. After Kovar plates and pins were preoxidized in N2 with 0℃, 10℃ and 20℃ dew points at 1000℃ for different times, Fe304 and Fe203 existed in the oxidation products on Kovar surface, and the quantity of Fe203 increased with increasing dew point and oxidation time. Then they were sealed with borosilicate glass insulator at 1030℃ for 20 rain. The results indicated that the type and quantity of oxidation products would directly influence the quality of glass-to-metal seals. With the increase of oxidation products, gas bubbles in the glass insulator were more serious, the climbing height of glass along the pins was higher, and corrosion of Kovar pins caused from the molten glass was transformed from uniform to the localized.     

Preparation and properties of Ni-plated glass beads/PVC composite

Ni-plated glass beads（GB） was obtained by electroless plating, based on PVC adhesive, Niplated GB/PVC composite was prepared. Temperature insulation, fi re retardation and microwave absorption properties were tested, the results showed that the nickel coating was compact and continuous, Ni-plated GB/ PVC composite is a kind of excellent temperature insulated, fi re retardate and light-weight material, and especially for microwave absorption well; Refl ectivity was lower than-2 dB in the frequency range of 11-17 GHz.